EP0639482B1 - Adjustable snap away fastener - Google Patents

Adjustable snap away fastener Download PDF

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Publication number
EP0639482B1
EP0639482B1 EP94303872A EP94303872A EP0639482B1 EP 0639482 B1 EP0639482 B1 EP 0639482B1 EP 94303872 A EP94303872 A EP 94303872A EP 94303872 A EP94303872 A EP 94303872A EP 0639482 B1 EP0639482 B1 EP 0639482B1
Authority
EP
European Patent Office
Prior art keywords
probe
opening
door
airbag
spring clip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94303872A
Other languages
German (de)
French (fr)
Other versions
EP0639482A1 (en
Inventor
Mark Rogers
Larry D. Rose
Donald R. Lauritzen
Melinda M. Newhouse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Morton International LLC
Original Assignee
Morton International LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Morton International LLC filed Critical Morton International LLC
Publication of EP0639482A1 publication Critical patent/EP0639482A1/en
Application granted granted Critical
Publication of EP0639482B1 publication Critical patent/EP0639482B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/216—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member comprising tether means for limitation of cover motion during deployment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/20—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts for bolts or shafts without holes, grooves, or notches for locking members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
    • F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
    • F16B5/065—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship the plates being one on top of the other and distanced from each other, e.g. by using protrusions to keep contact and distance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
    • F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
    • F16B5/0657—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship at least one of the plates providing a raised structure, e.g. of the doghouse type, for connection with the clamps or clips of the other plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
    • B60R2021/2172—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together the cover being connected to the surrounding part and to the module, e.g. floating mounts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
    • B60R21/2171—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32606—Pivoted
    • Y10T403/32861—T-pivot, e.g., wrist pin, etc.

Definitions

  • the airbag reaction canister is mounted behind the vehicle's instrument panel.
  • a portion of the instrument panel forms a deployment door which is designed to break away under the influence of the inflating airbag. It is crucial to the airbag operation that the door completely separates from the instrument panel and moves out of the way of the inflating bag. However, it is also important that the door fit snugly into the instrument panel so as to present an aesthetically pleasing appearance.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Description

This invention relates to the field of automotive airbag restraint systems. More particularly, it relates to the interconnection between the airbag reaction canister and the airbag deployment door of the instrument panel.
In passenger side airbag restraint systems, the airbag reaction canister is mounted behind the vehicle's instrument panel. A portion of the instrument panel forms a deployment door which is designed to break away under the influence of the inflating airbag. It is crucial to the airbag operation that the door completely separates from the instrument panel and moves out of the way of the inflating bag. However, it is also important that the door fit snugly into the instrument panel so as to present an aesthetically pleasing appearance.
It has been difficult to achieve these objectives during the vehicle assembly or upon airbag replacement. A system for fastening an instrument panel deployment door of an automotive airbag restraint system simultaneously into an opening in an instrument panel and into engagement with an airbag module reaction canister which comprises snap fastening means is known from US - A - 5 211 421. The snap fastening means require relatively precise positioning to assure proper alignment of the door. Accordingly, it is a primary object of the present invention to provide a snap fastening system which permits substantial flexibility between a connector on the reaction can and a connector on the door but holds the door firmly in position on installation by the assembler. Another object is to permit the breakaway force to be varied for different installations. Other objects, features, and advantages will become apparent from the following description and the appended claims.
A system is provided for fastening an instrument panel deployment door of an automotive airbag restraint system simultaneously into the instrument panel opening and into engagement with the airbag module reaction canister. A spring clip is mounted on either the reaction canister or the deployment door. The clip defines an opening which is adapted to receive an elongated probe which is inserted therethrough. It is also resistant to subsequent withdrawal of the probe. A base member is mounted on the other of the canister and deployment door. An elongated probe has a first end which pivotally engages the base member. It is forcibly detachable therefrom. A second end of the probe member is adapted to enter the opening of the clip as the deployment door is positioned into the instrument panel opening.
A preferred embodiment of the invention will now be described with reference to the accompanying drawings wherein:
  • FIG. 1 is an elevational view of an airbag module reaction canister and the instrument panel deployment door connected thereto;
  • FIG. 2 is an enlarged cross-section taken substantially along the line 2-2 of FIG. 1; and
  • FIG. 3 is a cross-section taken substantially along the line 3-3 of FIG. 2.
    • FIG. 1 illustrates a passenger side airbag module M including a reaction canister C to which is secured a deployable door D mounted in an opening of instrument panel P. A conventional tether T restrains movement of the door D upon airbag inflation. The construction of the snap away fastener of this invention is shown most clearly in FIGS. 2 and 3. The reaction canister C includes a pair of L-shaped brackets 10 on opposite sides of the canister opening. Each includes a central opening 12. A substantially U-shaped spring clip 14 is mounted on each of the brackets 10. The spring clip 14 may be of a metal such as steel and includes an upper surface which engages the ends of the opening 12 by means of downwardly extending tabs 16. The bottom leg of the spring clip 14 underlies the opening 12 and itself defines an opening 18 surrounded by serrated margins forming teeth 20.
    Mounted on the inner surface of the deployment door D are a pair of base members 22. Alternatively, these members may be integral parts of the door D. The base members 22 are plastic and may be molded or extruded. Each defines a cylindrical socket 24.
    Each of the base members 22 on the deployment door D connects to a spring clip 14 on the reaction canister. They are interconnected by means of plastic probe members 26. Each of the probe members 26 has at one end a cylindrical head 28 which is bifurcated by a slot 30. As a result, the head 28 is sufficiently resilient to permit it to be passed through a slot 32 in the base member 22 and fit within the cylindrical socket 24 as shown in FIG. 3. The body 34 of the probe member 26 is elongated and of rectangular cross-section and terminates in a tapered tip 36.
    During assembly, each of the probe members 26 is mounted in a respective base member 22 as illustrated in FIG. 3. Due to the cylinder and socket construction, there is substantial freedom of movement so that the probe members 26 are not rigidly fixed relative to the door D. Accordingly, the door D is advanced into the opening in the instrument panel P and the plastic shank 34 of each probe member 26 is inserted into the opening 18 of one of the spring clips 14. It will also be noted that the opening 18 is substantially longer than the width of the shank 34. This creates still another degree of freedom. All the assembler need do is properly align the deployment door D with the instrument panel opening and push the door into position. This causes the shank 34 of each of the probe members 26 to advance into the opening 18 of the spring clip 14, whereupon the teeth 20 are depressed inwardly as shown in FIG. 3. As a result, when the door D is finally seated, probe members 26 are firmly engaged so that subsequent withdrawal of the shank 34 is extremely difficult. However, upon subsequent airbag inflation, the base members 22 detach from the cylindrical heads 28 of each of the probe members as shown by the dash-dot lines of FIG. 1. One of the features of this invention is that the release force required to break away the deployment door D is easily adjustable by varying the length of the cylindrical attachment between the probe members 26 and the base members 22. One way of making such an adjustment is to simply vary the width of the probe members 26. When these are extruded, the extension is simply cut at the proper intervals to form probe members of the desired widths.

    Claims (11)

    1. A system for fastening an instrument panel deployment door (D) of an automotive airbag restraint system simultaneously into an opening in an instrument panel (P) and into engagement with an airbag module reaction canister (C) which comprises:
      a spring clip (14) mounted on one of said reaction canister and deployment door, said clip defining an opening (18) adapted to receive an elongated probe inserted therethrough but resistant to subsequent withdrawal of said probe;
      a base member (22) mounted to the other of said reaction canister and deployment door; and
      an elongated probe member (26) having a first end pivotally engaging said base member but forcibly detachable therefrom and a second end (36) adapted to enter the opening of said clip upon positioning of said deployment door into said instrument panel opening.
    2. A system according to claim 1 wherein said spring clip (14) is mounted on said reaction canister (C).
    3. A system according to claim 1 or claim 2 wherein one of said base member (22) and probe member (26) defines a substantially cylindrical socket (24) and the other carries a cylinder (28) enclosed by said socket.
    4. A system according to claim 3 wherein the socket (24) is defined by said base member (22).
    5. A system according to claim 3 or claim 4 wherein said cylinder is substantially hollow and bifurcated.
    6. A system according to any preceding claim wherein the opening (18) in said spring clip is defined by at least one margin which is deformable by insertion of said elongated probe.
    7. A system according to claim 6 wherein said margin is serrated (20).
    8. An automotive airbag restraint system of the type including an airbag module reaction canister (C) positioned behind an instrument panel deployment door (D), comprising a system for fastening said door as defined in claim 1, wherein
      at least one spring clip (14) is mounted on said reaction canister, said clip defining an opening (18) deformable upon insertion of an elongated probe (34) therethrough to resist subsequent withdrawal of said probe;
      at least one substantially cylindrical socket (24) carried by said deployment door; and
      an elongated locking member (26) having a first end defining a cylinder (28) seatable in said cylindrical socket and a second end (36) forming a probe insertable into the opening of said spring clip,
      whereby inflation of the airbag of said restraint system separates the cylinder (28) from the socket (24) and permits the door to deploy.
    9. An airbag restraint system according to claim 8 wherein said cylinder (28) is substantially hollow and bifurcated.
    10. An airbag restraint system according to claim 8 or claim 9 wherein said probe is made of plastics material.
    11. An airbag restraint system according to any one of claims 8 to 10 wherein said spring clip is metal.
    EP94303872A 1993-08-03 1994-05-27 Adjustable snap away fastener Expired - Lifetime EP0639482B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    US101187 1993-08-03
    US08/101,187 US5458365A (en) 1993-08-03 1993-08-03 Adjustable snap away fastener

    Publications (2)

    Publication Number Publication Date
    EP0639482A1 EP0639482A1 (en) 1995-02-22
    EP0639482B1 true EP0639482B1 (en) 1998-03-25

    Family

    ID=22283417

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP94303872A Expired - Lifetime EP0639482B1 (en) 1993-08-03 1994-05-27 Adjustable snap away fastener

    Country Status (6)

    Country Link
    US (1) US5458365A (en)
    EP (1) EP0639482B1 (en)
    JP (1) JP2504702B2 (en)
    KR (1) KR950005644A (en)
    CA (1) CA2122983A1 (en)
    DE (1) DE69409182T2 (en)

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    JPH03112747A (en) * 1989-09-25 1991-05-14 Takata Kk Module cover for air bag device
    JP2890757B2 (en) * 1990-09-05 1999-05-17 トヨタ自動車株式会社 Airbag door opening mechanism
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    Also Published As

    Publication number Publication date
    JP2504702B2 (en) 1996-06-05
    US5458365A (en) 1995-10-17
    JPH0761311A (en) 1995-03-07
    EP0639482A1 (en) 1995-02-22
    KR950005644A (en) 1995-03-20
    DE69409182T2 (en) 1998-08-06
    CA2122983A1 (en) 1995-02-04
    DE69409182D1 (en) 1998-04-30

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